These are the most-read Science News stories of 2018

More than 11 million people visited the Science News website this year. Check out this recap of the most-read stories of 2018, and the most popular stories published this year on each of our blogs.

Top 10 stories

1. Male birth control pill passes a safety testMen who took a prototype once-daily contraceptive pill for about a month saw their testosterone and other reproductive hormones safely plummet to levels known to halt sperm development, a small study found (SN Online: 3/21/18).

2. A 5,000-year-old mass grave harbors the oldest plague bacteria ever foundThe skeleton of a long-dead Scandinavian woman yielded bacterial DNA showing that she contracted the earliest known case of the plague in humans (SN Online: 12/6/18). The ancient microbe’s genetic code could help uncover the origins of the deadly disease.

3. What I actually learned about my family after trying 5 DNA ancestry testsInterested in unraveling your DNA to learn more about your family history? Science News writer Tina Hesman Saey took DNA ancestry tests offered by several consumer genetic testing companies and shared the good, the bad and the confusing (SN Online: 6/13/18).

4. The brain may clean out Alzheimer’s plaques during sleepA provocative theory that sleep deprivation can cause the brain’s garbage disposal to short-circuit, leading to Alzheimer’s disease, is getting renewed attention (SN Online: 7/15/18).

5. This South African cave stone may bear the world’s oldest drawingAt more than 70,000 years old, red lines crosshatched onto a rock found in a South African cave may be the oldest known drawing, some archaeologists contend (SN Online: 9/12/18).

6. Wombats are the only animals whose poop is a cube. Here’s how they do itThe stout marsupials native to Australia can thank their elastic intestines for their distinctive cubelike feces. Wombats’ cuboid nuggets mark their territory, but the stackable scat can even be rolled like dice, one scientist found (SN Online: 11/18/18).

7. Mars (probably) has a lake of liquid waterA 15-year-old Mars orbiter spotted signs of a salty lake beneath the Red Planet’s south polar ice sheets (SN Online: 7/25/18). In contrast to past hints of water on Mars, this lake might mark the first discovery of a long-lasting cache of the liquid.

8. Astronomers scrutinized last year’s eclipse. Here’s what they’ve learnedAstronomers observed the 2017 total solar eclipse from the ground and the air, and found some never-before-seen features of the sun’s atmosphere (SN Online: 5/29/18).

9. Last year’s solar eclipse set off a wave in the upper atmosphereThe August 2017 solar eclipse also launched a wave in the upper atmosphere that was detected from Brazil after the eclipse ended (SN Online: 5/26/18). Though past eclipses have set off waves in the ionosphere, this was the first time scientists had seen one in the uncharged part of the atmosphere.

10. Physicists finally calculated where the proton’s mass comes fromA proton’s mass is more than just the sum of its parts (SN Online: 11/26/18). And now scientists know just what accounts for the subatomic particle’s heft.

Top blog posts

Context | Tom Siegfried

In honor of his centennial, the Top 10 Feynman quotationsPhysicist and Nobel laureate Richard Feynman was a curious character who made many quotable observations on science and life (SN Online: 5/11/18).

Science Ticker | Science News Staff

Here’s the key ingredient that lets a centipede’s bite take down preyA so-called “spooky toxin” helps tropical centipedes overpower large prey. Insight into how the venom affects lab mice may lead to a treatment for people who receive painful bites from these leggy creatures (SN Online: 1/22/18).

Growth Curve | Laura Sanders

A new study eases fears of a link between autism and prenatal ultrasoundsThe increasing number of ultrasound scans that women receive during pregnancy are not associated with rising rates of autism diagnoses, scientists found (SN Online: 2/21/18).

Science News, visualized

In 2018, Science News joined Instagram. This year, the most popular Science News Instagram post featured a story about a new microscope that researchers used to track how mice are built, cell by cell (SN: 11/10/18, p. 32).

Follow @sciencenewsmagazine on Instagram for more dazzling science stories.

Wild Things | Sarah Zielinski

How a deep-sea geology trip led researchers to a doomed octopus nurseryA recently discovered colony of purple octopuses chose the wrong brooding spot on a rocky outcrop. They will probably die because of the warm, low-oxygen water seeping from the rock (SN Online: 5/15/18).

Scicurious | Bethany Brookshire

To regulate fecal transplants, FDA has to first answer a serious question: What is poop?Fecal transplants are promising treatments for some illnesses, but putting effective regulations in place is proving to be a tricky business (SN Online: 5/18/18).

Science the Public | Science News Staff

Forget Pi Day. We should be celebrating Tau DayReplacing the mathematical constant pi with the constant tau could make certain math subjects easier for students to learn (SN Online: 3/14/18).